Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755768AbdGKLCt (ORCPT ); Tue, 11 Jul 2017 07:02:49 -0400 Received: from sci-ig2.spreadtrum.com ([222.66.158.135]:36579 "EHLO SHSQR01.spreadtrum.com" rhost-flags-OK-FAIL-OK-OK) by vger.kernel.org with ESMTP id S1752303AbdGKLB1 (ORCPT ); Tue, 11 Jul 2017 07:01:27 -0400 From: Chunyan Zhang To: Stephen Boyd , Michael Turquette , Rob Herring , Mark Rutland CC: , , , , Arnd Bergmann , Mark Brown , Xiaolong Zhang , Ben Li , Orson Zhai , Chunyan Zhang , Chunyan Zhang Subject: [PATCH V2 07/10] clk: sprd: add composite clock support Date: Tue, 11 Jul 2017 18:56:24 +0800 Message-ID: <20170711105627.20526-8-chunyan.zhang@spreadtrum.com> X-Mailer: git-send-email 2.12.2 In-Reply-To: <20170711105627.20526-1-chunyan.zhang@spreadtrum.com> References: <20170711105627.20526-1-chunyan.zhang@spreadtrum.com> MIME-Version: 1.0 Content-Type: text/plain X-MAIL: SHSQR01.spreadtrum.com v6BB0t7R059662 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 4033 Lines: 148 This patch introduced composite driveri for Spreadtrum's SoCs. The functions of this composite clock simply consist of divider and mux clocks. Original-by: Xiaolong Zhang Signed-off-by: Chunyan Zhang --- drivers/clk/sprd/Makefile | 1 + drivers/clk/sprd/composite.c | 64 ++++++++++++++++++++++++++++++++++++++++++++ drivers/clk/sprd/composite.h | 47 ++++++++++++++++++++++++++++++++ 3 files changed, 112 insertions(+) create mode 100644 drivers/clk/sprd/composite.c create mode 100644 drivers/clk/sprd/composite.h diff --git a/drivers/clk/sprd/Makefile b/drivers/clk/sprd/Makefile index 80e6039..2262e76 100644 --- a/drivers/clk/sprd/Makefile +++ b/drivers/clk/sprd/Makefile @@ -4,3 +4,4 @@ clk-sprd-y += common.o clk-sprd-y += gate.o clk-sprd-y += mux.o clk-sprd-y += div.o +clk-sprd-y += composite.o diff --git a/drivers/clk/sprd/composite.c b/drivers/clk/sprd/composite.c new file mode 100644 index 0000000..25b045d --- /dev/null +++ b/drivers/clk/sprd/composite.c @@ -0,0 +1,64 @@ +/* + * Spreadtrum composite clock driver + * + * Copyright (C) 2017 Spreadtrum, Inc. + * + * SPDX-License-Identifier: GPL-2.0 + */ + +#include + +#include "composite.h" + +DEFINE_SPINLOCK(sprd_comp_lock); +EXPORT_SYMBOL_GPL(sprd_comp_lock); + +static long sprd_comp_round_rate(struct clk_hw *hw, unsigned long rate, + unsigned long *parent_rate) +{ + struct sprd_comp *cc = hw_to_sprd_comp(hw); + + return sprd_div_helper_round_rate(&cc->common, &cc->div, + rate, parent_rate); +} + +static unsigned long sprd_comp_recalc_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + struct sprd_comp *cc = hw_to_sprd_comp(hw); + + return sprd_div_helper_recalc_rate(&cc->common, &cc->div, parent_rate); +} + +static int sprd_comp_set_rate(struct clk_hw *hw, unsigned long rate, + unsigned long parent_rate) +{ + struct sprd_comp *cc = hw_to_sprd_comp(hw); + + return sprd_div_helper_set_rate(&cc->common, &cc->div, + rate, parent_rate); +} + +static u8 sprd_comp_get_parent(struct clk_hw *hw) +{ + struct sprd_comp *cc = hw_to_sprd_comp(hw); + + return sprd_mux_helper_get_parent(&cc->common, &cc->mux); +} + +static int sprd_comp_set_parent(struct clk_hw *hw, u8 index) +{ + struct sprd_comp *cc = hw_to_sprd_comp(hw); + + return sprd_mux_helper_set_parent(&cc->common, &cc->mux, index); +} + +const struct clk_ops sprd_comp_ops = { + .get_parent = sprd_comp_get_parent, + .set_parent = sprd_comp_set_parent, + + .round_rate = sprd_comp_round_rate, + .recalc_rate = sprd_comp_recalc_rate, + .set_rate = sprd_comp_set_rate, +}; +EXPORT_SYMBOL_GPL(sprd_comp_ops); diff --git a/drivers/clk/sprd/composite.h b/drivers/clk/sprd/composite.h new file mode 100644 index 0000000..f5ca0c9 --- /dev/null +++ b/drivers/clk/sprd/composite.h @@ -0,0 +1,47 @@ +/* + * Spreadtrum composite clock driver + * + * Copyright (C) 2017 Spreadtrum, Inc. + * + * SPDX-License-Identifier: GPL-2.0 + */ + +#ifndef _SPRD_COMPOSITE_H_ +#define _SPRD_COMPOSITE_H_ + +#include "common.h" +#include "mux.h" +#include "div.h" + +struct sprd_comp { + struct sprd_mux_internal mux; + struct sprd_div_internal div; + struct sprd_clk_common common; +}; + +#define SPRD_COMP_CLK(_struct, _name, _parent, _reg, _table, \ + _mshift, _mwidth, _dshift, _dwidth, _flags) \ + struct sprd_comp _struct = { \ + .mux = _SPRD_MUX_CLK(_mshift, _mwidth, _table), \ + .div = _SPRD_DIV_CLK(_dshift, _dwidth), \ + .common = { \ + .reg = _reg, \ + .lock = &sprd_comp_lock, \ + .hw.init = CLK_HW_INIT_PARENTS(_name, \ + _parent, \ + &sprd_comp_ops, \ + _flags), \ + } \ + } + +static inline struct sprd_comp *hw_to_sprd_comp(const struct clk_hw *hw) +{ + struct sprd_clk_common *common = hw_to_sprd_clk_common(hw); + + return container_of(common, struct sprd_comp, common); +} + +extern const struct clk_ops sprd_comp_ops; +extern spinlock_t sprd_comp_lock; + +#endif /* _SPRD_COMPOSITE_H_ */ -- 2.7.4